1331211373 has 2 divisors, whose sum is σ = 1331211374. Its totient is φ = 1331211372.

The previous prime is 1331211317. The next prime is 1331211397. The reversal of 1331211373 is 3731121331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189077289 + 142134084 = 34483^2 + 11922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331211373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331211313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665605686 + 665605687.

It is an arithmetic number, because the mean of its divisors is an integer number (665605687).

Almost surely, 2^1331211373 is an apocalyptic number.

It is an amenable number.

1331211373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331211373 is an equidigital number, since it uses as much as digits as its factorization.

1331211373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 25.

The square root of 1331211373 is about 36485.7694587904. The cubic root of 1331211373 is about 1100.0582263944.

The spelling of 1331211373 in words is "one billion, three hundred thirty-one million, two hundred eleven thousand, three hundred seventy-three".